multiple changes

- build more things with gmake (I think the regular `make` on my system
is broken)
- give gnutls2 its own separate sub-prefix, to prevent conflicts
- fix stuff
- ghostscript and debug variants for libwmf
- zlib and gobject variants for poppler (gobject support doesn't work
on my local install...)
- more work on bootstrapping the MacPorts port
- fix some build errors I ran into when trying to build dpkg on my home
computer
- try to fix FileZilla for my computer (still broken)
- update xset dependencies and stuff (port-depcheck.sh)